Last week some time, Keynote started making that strange beep noise that Macs make when you type something and the application doesn't allow you to type. Odder still, even though the app makes that noise, I can still type, with the noise coming up every time I press a key. It's a PITA!

That's a strange one. Let's determine if it's system level or user level. Does it happen with another user? Try moving any keynote prefs out of your home preference folder if it doesn't do it with another user, relaunch Keynote.

Under Universal Access prefs, Hearing, check mark flash the screen... to see if it's a system alert or a keynote alert.

It's a system alert, Reboot--thanks for that suggestion. And no, on a different account there's no problem. Since it's a system alert, is there something that I can do with the app itself or is there a system preference that needs to be changed?

Might try throwing away the iWork stuff and reinstalling too. It's usually something user level since it doesn't happen with another user. Usually but not always.

You don't have any third party keystroke modifiers installed that could cause it? If you're not sure try a Safe Boot. If it doesn't do it with a Safe Boot then it's some third party software or preference pane.

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